Backend engineer python in AI

Joppy; Barcelona; Ibrido; EUR 55.000 - 85.000; Tempo pieno

Vantaggi offerti da questo lavoro

Stock options

Hybrid work (3 days onsite)

Gran Via Barcelona office

Flexible benefits

Descrizione del lavoro

Joppy is seeking an experienced Backend Engineer to design, build, and scale our backend systems powering AI-driven information verification and representation. You’ll work across layers, collaborating with the core team to deliver end-to-end backend solutions.

You should bring deep Python experience, familiarity with FastAPI, and a strong track record in distributed systems. The role supports a hybrid setup in Barcelona with a competitive salary and stock options.

Competenze

• 4+ years of hands-on backend engineering experience with depth in Python, APIs and distributed systems.
• Ability to reason about technical decisions with clear pros/cons.
• Curiosity across end-to-end system components including infrastructure and data.

Mansioni

• Design and build backend services using Python (FastAPI).
• Architect data storage and retrieval systems with SQL and NoSQL (Postgres, Redis, Cassandra, graph DBs).
• Develop and maintain scalable pipelines (batch and streaming).
• Work with AWS and Kubernetes in containerized environments.
• Explore AI tooling and enable cross-functional architecture decisions.
• Contribute to clean, pragmatic, high-quality engineering practices.

Conoscenze

Python

APIs

Distributed systems

FastAPI

DevOps practices

Strumenti

PostgreSQL

Redis

Cassandra

Graph databases

SQL

Descrizione del lavoro

Описание

One of the companies we work with at Joppy is looking for a Backend Engineer to join the team. We're looking for an experienced backend engineer with depth. You'll come from a Backend Engineering background - Python, APIs, distributed systems - but what matters most is your motivation to build across layers and solve complex problems end-to-end. Backend is your anchor, but this is a high-impact engineering position for someone who enjoys working with multiple parts of the system rather than in a narrow specialization. You'll work closely with our core team to design, build, and scale the backend systems that power large-scale AI-driven information verification and representation.

Задачи

• Design and build backend services using Python (FastAPI)
• Architect data storage and retrieval systems using SQL and NoSQL technologies (Postgres, Redis, Cassandra, graph databases)
• Develop and maintain scalable pipelines (batch and streaming)
• Work with cloud infrastructure on AWS and containerized environments (Kubernetes)
• Experiment with emerging AI engineering tooling (coding agents, MCP ecosystems, etc.)
• Collaborate on system design and cross-functional architectural decisions
• Contribute to a culture of clean, pragmatic, high-quality engineering

Требования

• Strong background in: Backend Engineering (Python, APIs, distributed systems)
• Technical stack we commonly work with: Python FastAPI or similar frameworks AWS Kubernetes SQL and NoSQL databases (Postgres, Redis; Cassandra or graph databases are a plus)
• DevOps practices
• 4+ years of hands-on backend engineering experience, with real depth - you've gone deep, not wide and shallow
• Able to reason about and justify your technical decisions: pros, cons, why A over B
• Curious about how things work end-to-end, including the parts adjacent to your own - infrastructure, data, the systems your code runs on
• Curious about the AI ecosystem and modern developer tooling
• Comfortable in a fast-moving startup environment
• C1+ level in either English or Spanish (fluency in either is acceptable)
• Будет плюсом: Cassandra or graph databases are a plus; Search systems or information retrieval is a nice to have; Builders at heart: hackathons, side projects, open-source contributions, active GitHub are all highly appreciated

Условия

• Competitive salary
• Stock options
• Hybrid model: 3 days per week onsite
• New office on Gran Via (Barcelona), with a full dedicated space.
• Flexible benefits covering transport, meals, and health insurance.